Antilock Brakes / Traction Control Systems

Diagnostic Routine P

Diagnostic Overview

U3003:17

Normal Operation and Fault Conditions

The ABS (Anti-Lock Brake System) module, hydraulic pump and solenoid valves require an operating voltage that is between 10 and 17 volts. The ABS (Anti-Lock Brake System) module receives this voltage from the BJB (Battery Junction Box). The ABS (Anti-Lock Brake System) module has a single ground circuit located in the engine compartment wiring harness. An overcharging condition in the charging system will result in the ABS (Anti-Lock Brake System) module setting a DTC (Diagnostic Trouble Code). This DTC (Diagnostic Trouble Code) may also set in the ABS (Anti-Lock Brake System) module due to battery charging or vehicle jump starting events.

DTC Fault Trigger Conditions






Pinpoint Test

1. CHECK FOR HIGH VOLTAGE DTCs (Diagnostic Trouble Codes) SET IN OTHER MODULES

1. Ignition ON.

2. Using a scan tool, retrieve and record all CMDTCs (Continuous Memory Diagnostic Trouble Codes).

Is DTC (Diagnostic Trouble Code) B1317, B1318, B1676, U3003:16 or U3003:17 present in one or more modules AND are any charging system DTCs (Diagnostic Trouble Codes) present in the PCM (Powertrain Control Module)?






2. CHECK THE BATTERY VOLTAGE

1. Turn off all interior/exterior lights and accessories.

2. NOTE: Do not allow the engine speed to increase above 2,000 RPM (Revolutions Per Minute) while performing this step or the generator may self-excite and result in default charging system output voltage. If engine speed goes above 2,000 RPM (Revolutions Per Minute), turn the vehicle off and restart the engine before performing this step.

Start and run the engine at approximately 1,500 RPM (Revolutions Per Minute) for 3 minutes while monitoring the battery voltage.

Is the battery voltage between 13 and 15.2 volts?






3. RECHECK THE ABS (Anti-Lock Brake System) MODULE FOR DTC (Diagnostic Trouble Code) U3003:17

1. Turn the engine off.

2. Ignition ON.

3. Using a scan tool, carry out the ABS (Anti-Lock Brake System) module self-test.

4. Clear the ABS (Anti-Lock Brake System) module DTCs (Diagnostic Trouble Codes).

5. Ignition OFF.

6. Ignition ON.

7. Repeat the ABS (Anti-Lock Brake System) module self-test.

Is DTC (Diagnostic Trouble Code) U3003:17 still present?






4. CHECK FOR CORRECT ABS (Anti-Lock Brake System) MODULE OPERATION

1. Ignition OFF.

2. Disconnect and inspect the ABS (Anti-Lock Brake System) Module electrical connector.

3. Repair:

- corrosion (install new connector or terminal - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary

4. Connect the ABS (Anti-Lock Brake System) Module electrical connector. Make sure it seats and latches correctly.

5. Operate the system and determine if the concern is still present.

Is the concern still present?